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- FaceSaver Format Revealed
-
-
- A FaceSaver image is an ASCII file containing some or all of the
- following lines:
-
- FirstName:
- LastName:
- E-mail:
- Telephone:
- Company:
- Address1:
- Address2:
- CityStateZip:
- Date:
- PicData: Actual data: width - height - bits/pixel
- Image: Should be transformed to: width - height - bits/pixel
- (A REQUIRED Blank line)
-
- Hexified picture in scanline order, in the form suitable for
- printing in postscript. It is unpadded scanlines, I believe left to
- right. If it is bottom to top it is due to funny transforms in going
- from the real scanned image, which came from a video camera turned on
- its side! (to get a portrait aspect ratio). All the images are 8
- bits per pixel, and have been intensity levelled to use up the full
- dynamic range (each pixel multiplied by 256/(max-min) and shifted so
- that min becomes zero). I'm sorry about that, I should have put out
- untransformed data. The original frame grabbing was off a Targa M8,
- and the gamma varied due to a number of real world factors. Most
- pictures had a dynamic range in the 128--196 vicinity.
-
- The line labeled Image: can be used to correct for non-square pixels.
- In most cases, there are 108 (non-square) pixels across in the data,
- but they would have been 96 pixels across if they were square.
- Therefore, Image: says 96, PicData says 108.
-
- Lou Katz
- Saver of Lost Faces
-
- lou@usenix.org
- (415) 530-8870
-
-
-